I closely followed the tutorial but opted to incorporate some extra features towards the end.

 

Now, the player can throw their pickaxe to eliminate enemies.

Bombs rain down from the sky at random intervals.

Retracting spikes are an additional enemy type, the player must face.

Floortiles come in different sizes and occasionally spawn healing hearts.

There also is a pause menu, allowing the player to view the controls, quit the game, or change audio settings.

Lastly, your round duration is saved as an additional high score.

 

The current build of the game can be found here:

https://drive.google.com/file/d/1cra5hkvneTdsepaKuDAdlrnUyTp0S3LV/view?usp=drive_link